The Hostile Intent
Website has the debut release of this Half-Life modification. Here's their
description of the mod's focus on realism to give a sense of what this is all
about: "Hostile Intent is all about realism, covering realistic weapon damage,
realistic missions and mission stories. Hostile Intent gives the player the
feeling he's actually there. Be it a nuclear submarine, an embassy raid or a
military base in the middle east, each and every one of them is modeled with a
level of detail that a lot of other games/mods/tc's don't have."